$$\text{Cytoplasm} = \text{Cytosol} + \text{All organelles within the cell}$$

Question 1

Which of the following best describes the function of the plasma membrane in a typical animal cell?

Accepted Answer

It regulates the movement of substances into and out of the cell.

Question 2

A scientist observes a cell with a double membrane surrounding its genetic material and nuclear pores. Which structure is being described?

Accepted Answer

Nuclear envelope

Question 3

Which organelle is primarily responsible for ATP production in eukaryotic cells?

Accepted Answer

Mitochondria

Question 4

If a cell is unable to synthesize proteins, which organelle is most likely malfunctioning?

Accepted Answer

Ribosome

Question 5

Which of the following best explains the difference between cytosol and cytoplasm?

Accepted Answer

Cytosol is the fluid portion of the cell, while cytoplasm includes the cytosol and all organelles except the nucleus.

Question 6

A cell is observed to have many rough endoplasmic reticulum structures. What is the primary function of this organelle?

Accepted Answer

Protein synthesis for secretion or membrane insertion

Question 7

Which organelle is responsible for packaging and modifying proteins before they are secreted from the cell?

Accepted Answer

Golgi apparatus

Question 8

A patient’s cells are unable to break down cellular waste and foreign material. Which organelle is most likely defective?

Accepted Answer

Lysosome

Question 9

Which structure is directly involved in cell division by organizing microtubules?

Accepted Answer

Centrioles

Question 10

Which of the following is the correct formula for the total volume of cytoplasm in a spherical cell with radius $$r$$?

Accepted Answer

$$V = \frac{4}{3} \pi r^3$

Question 11

A cell is observed to have a prominent nucleolus. What is the main function of the nucleolus?

Accepted Answer

Ribosome synthesis

Question 12

Which organelle is most directly involved in the synthesis of lipids and detoxification of drugs?

Accepted Answer

Smooth endoplasmic reticulum

Question 13

If a cell’s chromatin is abnormally condensed and cannot be accessed, which process will be most directly affected?

Accepted Answer

Transcription of DNA to mRNA

Question 14

Which of the following best describes the role of secretory vesicles in a cell?

Accepted Answer

They transport materials from the Golgi apparatus to the plasma membrane for exocytosis.

Question 15

A trachea slide shows cilia on the surface of epithelial cells. What is the primary function of these cilia?

Accepted Answer

To move mucus and trapped particles out of the respiratory tract

Question 16

Which of the following equations correctly represents the relationship between cytoplasm, cytosol, and organelles?

Accepted Answer

$$	ext{Cytoplasm} = 	ext{Cytosol} + 	ext{All organelles within the cell}$$

Question 17

A cell is observed to have many fat vacuoles. What is the most likely function of these structures?

Accepted Answer

Storage of energy reserves

Question 18

Which organelle is most directly involved in the modification and sorting of proteins and lipids for delivery to their destinations?

Accepted Answer

Golgi apparatus

Question 19

If a cell’s plasma membrane is damaged, which of the following processes would be most directly affected?

Accepted Answer

Regulation of substance entry and exit

Question 20

A cell is observed to have many free ribosomes and polysomes. What is the primary function of these structures?

Accepted Answer

Synthesis of proteins for use within the cell

The Cell: Structure and Function (BIO165 Lab 2 Study Notes)

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